We have two Windows 2003 servers that function as domain controllers and DNS servers. For DNS, they log entries for local workstations and point to our ISP for web name resolution. About a week ago, no client can access www.yahoo.com
. Check with our ISP and they report OK (also changed my DNS settings to their servers on my local workstation and can access yahoo). From what I understand, flushing the DNS cache on both servers should fix the problem, but I want to know (1) why this should matter if it's pointing out to the ISP for the info anyway and (2) what ramifications are of flushing the cache.